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EIA-310 square-hole equipment racks (Hammond CAGKIT-M6) screw size

M6 · length not stated in the sources

Our records put EIA-310 square-hole equipment racks (Hammond CAGKIT-M6) on M6 screws. None of the sources we found gives an exact length, so measure the original before you order.

Where it is used: M6 quadrex truss-head rack screw with cage nut - the standard pro-audio/broadcast/server rack fastener.

Head and drive, as the source states them: truss head.

This entry is marked confirmed and comes from cdn.automationdirect.com.

An M6 screw is 6 mm in diameter with a 1 mm pitch, tapped with a 5 mm drill; imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6.

EIA-310 square-hole equipment racks (Hammond CAGKIT-M6) screw specifications

One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.

ThreadLengthPitchHeadDriveWhere it goesStatus
M6not stated1 mmTruss headnot statedM6 quadrex truss-head rack screw with cage nut - the standard pro-audio/broadcast/server rack fastenerConfirmed

Fitment records and sources

M619mm (0.75in)confirmed

M6 quadrex truss-head rack screw with cage nut - the standard pro-audio/broadcast/server rack fastener

pitch 1 mm · tap 5 mm · clearance 6.6 mm · PH3 / Torx T30

How to check the screw before you buy

  1. Rack and enclosure hardware mixes metric and imperial (#8-32, #10-32, #6-32), so confirm the thread before forcing a screw.
  2. Diameter: across the threads an M6 screw measures about 6 mm with calipers (usually a hair under). If yours measures noticeably more or less, it is a different thread.
  3. Pitch: 1 mm from one thread crest to the next (10 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
  4. Length: for truss head screws, measure from under the head to the tip (countersunk heads are the exception: they are measured overall).
  5. Driver: the source does not name the drive. Standard M6 heads take PH3 for Phillips and T30 for Torx, and a 5 mm hex key for socket heads; a bit that fits loosely will cam out and strip the head.
  6. Tightening: no device-specific torque is published in these records. The site's general figure for M6 is about 7-10 N·m into metal threads and 2.5-4.0 N·m into plastic bosses; snug it up and stop.

Common mix-ups with M6

  • Server rack cage nuts come in M4/M5/M6 for the same square hole — confirm what your rails and equipment ears use.
  • Rack cage-nut screws for audio gear are usually M6, but the same rack may also take 10-32 or 12-24 imperial screws.

Pitch gauge · Screw size finder · Torque guide

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The same screw also fits

Devices whose records share a thread with EIA-310 square-hole equipment racks (Hammond CAGKIT-M6), closest length match first.

Questions about EIA-310 square-hole equipment racks (Hammond CAGKIT-M6) screws

What size screw does EIA-310 square-hole equipment racks (Hammond CAGKIT-M6) use?
M6 for M6 quadrex truss-head rack screw with cage nut - the standard pro-audio/broadcast/server rack fastener.
How long are the screws in EIA-310 square-hole equipment racks (Hammond CAGKIT-M6)?
None of the sources states a length. Remove one screw and measure it from under the head to the tip (overall for a countersunk head).
What is the thread pitch of an M6 screw?
1 mm (coarse), which is the standard pitch for M6 machine screws; a 0.75 mm fine pitch exists but is uncommon. The tap drill is 5 mm and the normal clearance hole is 6.6 mm.
What screwdriver do I need for EIA-310 square-hole equipment racks (Hammond CAGKIT-M6)?
The sources do not name the drive. For M6, Phillips heads normally take PH3 and Torx heads T30; socket heads take a 5 mm hex key.
Can I use an imperial screw instead of M6?
No. Imperial look-alike: 1/4in-20 (6.35 mm) — the tripod/camera thread; visibly larger than M6. Use a true M6 screw so it does not cross-thread or strip the hole.